PDF files are considered to be the most secure form of documentation because of the various features offered by the format. These documents can be protected by passwords, encryption techniques and local restrictions so that the data is not accessed by everyone. All these methods make PDF files apt for sharing over the Internet without the fear of getting tampered. This is also necessary as PDF file formats are most commonly used as e-books, white papers, datasheets, manuals, etc. While encryptions disable the search engines to access the metadata of the files, local restrictions make the files non-editable. However, users are often unable to access data they require when the documents are in PDF format and protected. To freely access PDF content, it is essential to first unprotect PDF files and remove the imposed restrictions from them. But, this can only be done by document authors who have put the restrictions and password protected the files.

For users who do not have the security password and access to the security settings of the files, it is difficult to unprotect PDF files to use them in any form. Removing protection from PDF files also become important for document authors sometimes when they lose their file passwords. In such a situation the files cannot be opened and desired changes cannot be made to the documents. Therefore, to resolve such issues, PDF restriction removal tools must be used. These tools are used to remove local restrictions from PDF files and open the documents for modification even if they are password protected. By removing local restriction from PDF files, the following actions can be performed:

Printing

Document Assembly

Content Copying

Content Copying for Accessibility

Page extraction

Commenting

Filling of Form Fields

Signing

Creation of Template Pages

To perform all the above mentioned tasks, it is necessary to unprotect PDF files and remove their local security. Software such as Kernel for PDF Restriction Removal is apt for this purpose. With the help of such software tool, both document users and authors can remove local restrictions form the documents. This makes the documents open for editing, annotating, modifying and using the data in any manner. Kernel for PDF Restriction Removal tool works independently and does not require Adobe Acrobat to be pre-installed in the system. Users can easily unprotect PDF documents with a click of mouse using this tool. Since it supports 40 bit RC4 and 128 bit RC4 decryption algorithms, users get real time access to he secured data.

PDF restriction removal tools work by decrypting the protected files and extracting the data from them. The recovered data is then saved in newly created PDF files with are without any local restrictions. This way, users are able to unprotect PDF documents and lift the security from them. However, PDF restriction removing tools cannot be used for removing encryptions from PDF files. The new PDF files created have data integrity maintained as all the content from the original secured PDF files are kept intact. The properties, formatting and internal structure of protected PDF files is kept unaltered as the original files are considered to be a read-only copy. Thus, PDF restriction removal tools help users in decrypting the actual files to unprotect PDF files.